God must be very old, and therefore they depict a form of the Lord like a very old man. But in the same Brahma Samhita , that is contradicted: although He is the oldest of all living entities , He has His eternal form as a fresh youth.
"You are the original lamp.Other incarnations may possess the same candle power as the original lamp but the original lamp is the beginning of all light" Lord Brahma, in "Prayers Offered by Lord Brahma to Lord Krsna," KRSNA BOOK,
Radha Krishna~Their love is timeless and immortal because it developed in separation from each other. The physical reality is of no importance to them for they live forever in the realm of spirit, of love, which is beyond space and time.